How did isolationism impact the US at the end of the 19th Century?

At the end of the 19th century, isolationism in the United States led to a focus on domestic issues and economic growth rather than foreign entanglements. However, as the U.S. emerged as an industrial power, isolationist policies began to shift, paving the way for increased involvement in global affairs, particularly in the context of Imperialism. This transition was exemplified by events such as the Spanish-American War in 1898, which marked a departure from strict isolationism and signaled the U.S. commitment to a more active role on the world stage. Ultimately, this shift laid the groundwork for America's future involvement in international conflicts and global politics.